Multi-material NiTi-PEEK hybrid cellular structures by selective laser melting and hot pressing: tribological characterization

In this study, a multi-material NiTi-PEEK cellular structured solution was designed, produced and characterized targeting orthopedic applications. For that purpose, Selective Laser Melting (SLM) technique was used to produce NiTi cellular structures with different open-cell sizes and wall thicknesse...

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Bibliographic Details
Main Author: Costa, M. M. (author)
Other Authors: Bartolomeu, Flávio (author), Palmeiro, J. (author), Guimarães, B. (author), Alves, N. (author), Miranda, G. (author), Silva, F. S. (author)
Format: article
Language:eng
Published: 2021
Subjects:
Multi-material structures
NiTi-PEEK
Selective laser melting
Hot pressing
Science & Technology
Online Access:http://hdl.handle.net/1822/74724
Country:Portugal
Oai:oai:repositorium.sdum.uminho.pt:1822/74724
Description
Summary:In this study, a multi-material NiTi-PEEK cellular structured solution was designed, produced and characterized targeting orthopedic applications. For that purpose, Selective Laser Melting (SLM) technique was used to produce NiTi cellular structures with different open-cell sizes and wall thicknesses. Hot Pressing (HP) technique was used to introduce PEEK in the open-cells of NiTi structures to obtain multi-material components. Morphological characterization showed that the selected SLM processing parameters were suited to achieve high-quality parts without significant defects. Tribological characterization proved an enhanced wear resistance to the multimaterial specimens when compared with the mono-material NiTi structures. These multi-material structures are a promising solution for providing a customized stiffness and superior wear resistance to NiTi structures to be integrated in innovative orthopedic designs.

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